package com.booby.generic;

import java.util.ArrayList;
import java.util.List;

/**
 * 功能描述: 下线通配符
 *
 * @author: lizt
 * @date: 2020/8/15 23:32
 **/

public class GenericLowerBoundary {

    public static void main(String[] args) {
        List<? super Number> numberList = new ArrayList<>();
        numberList.add(123);
        System.out.println(numberList.get(0));
    }
}
